181013256 has 24 divisors (see below), whose sum is σ = 490244430. Its totient is φ = 60337728.

The previous prime is 181013233. The next prime is 181013269. The reversal of 181013256 is 652310181.

It can be written as a sum of positive squares in only one way, i.e., 157101156 + 23912100 = 12534^2 + 4890^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1256965 + ... + 1257108.

Almost surely, 2^181013256 is an apocalyptic number.

It is an amenable number.

181013256 is an abundant number, since it is smaller than the sum of its proper divisors (309231174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181013256 is a wasteful number, since it uses less digits than its factorization.

181013256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514085 (or 2514078 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 181013256 is about 13454.1166934140. The cubic root of 181013256 is about 565.6790915619.

The spelling of 181013256 in words is "one hundred eighty-one million, thirteen thousand, two hundred fifty-six".